Flux and turnover of fixed carbon in soil microbial biomass of limed and unlimed plots of an upland grassland ecosystem

Juan Ignacio Rangel-Castro, James Ivor Prosser, N. Ostle, C. M. Scrimgeour, Kenneth Stuart Killham, Andrew Alexander Meharg

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The influence of liming on rhizosphere microbial biomass C and incorporation of root exudates was studied in the field by in situ pulse labelling of temperate grassland vegetation with (CO2)-C-13 for a 3-day period. In plots that had been limed (CaCO3 amended) annually for 3 years, incorporation into shoots and roots was, respectively, greater and lower than in unlimed plots. Analysis of chloroform-labile C demonstrated lower levels of C-13 incorporation into microbial biomass in limed soils compared to unlimed soils. The turnover of the recently assimilated C-13 compounds was faster in microbial biomass from limed than that from unlimed soils, suggesting that liming increases incorporation by microbial communities of root exudates. An exponential decay model of C-13 in total microbial biomass in limed soils indicated that the half-life of the tracer within this carbon pool was 4.7 days. Results are presented and discussed in relation to the absolute values of C-13 fixed and allocated within the plant-soil system.

Original languageEnglish
Pages (from-to)544-552
Number of pages8
JournalEnvironmental Microbiology
Volume7
Issue number4
DOIs
Publication statusPublished - Apr 2005

Keywords

  • SUBSTRATE-INDUCED RESPIRATION
  • FUMIGATION-EXTRACTION
  • LOLIUM-PERENNE
  • RHIZOSPHERE
  • PLANT
  • COMMUNITY
  • RYEGRASS
  • RNA
  • DECOMPOSITION
  • METABOLISM

Cite this

Flux and turnover of fixed carbon in soil microbial biomass of limed and unlimed plots of an upland grassland ecosystem. / Rangel-Castro, Juan Ignacio; Prosser, James Ivor; Ostle, N.; Scrimgeour, C. M.; Killham, Kenneth Stuart; Meharg, Andrew Alexander.

In: Environmental Microbiology, Vol. 7, No. 4, 04.2005, p. 544-552.

Research output: Contribution to journalArticle

Rangel-Castro, Juan Ignacio ; Prosser, James Ivor ; Ostle, N. ; Scrimgeour, C. M. ; Killham, Kenneth Stuart ; Meharg, Andrew Alexander. / Flux and turnover of fixed carbon in soil microbial biomass of limed and unlimed plots of an upland grassland ecosystem. In: Environmental Microbiology. 2005 ; Vol. 7, No. 4. pp. 544-552.
@article{585b2ee7c9b14569b4c15514ce000a14,
title = "Flux and turnover of fixed carbon in soil microbial biomass of limed and unlimed plots of an upland grassland ecosystem",
abstract = "The influence of liming on rhizosphere microbial biomass C and incorporation of root exudates was studied in the field by in situ pulse labelling of temperate grassland vegetation with (CO2)-C-13 for a 3-day period. In plots that had been limed (CaCO3 amended) annually for 3 years, incorporation into shoots and roots was, respectively, greater and lower than in unlimed plots. Analysis of chloroform-labile C demonstrated lower levels of C-13 incorporation into microbial biomass in limed soils compared to unlimed soils. The turnover of the recently assimilated C-13 compounds was faster in microbial biomass from limed than that from unlimed soils, suggesting that liming increases incorporation by microbial communities of root exudates. An exponential decay model of C-13 in total microbial biomass in limed soils indicated that the half-life of the tracer within this carbon pool was 4.7 days. Results are presented and discussed in relation to the absolute values of C-13 fixed and allocated within the plant-soil system.",
keywords = "SUBSTRATE-INDUCED RESPIRATION, FUMIGATION-EXTRACTION, LOLIUM-PERENNE, RHIZOSPHERE, PLANT, COMMUNITY, RYEGRASS, RNA, DECOMPOSITION, METABOLISM",
author = "Rangel-Castro, {Juan Ignacio} and Prosser, {James Ivor} and N. Ostle and Scrimgeour, {C. M.} and Killham, {Kenneth Stuart} and Meharg, {Andrew Alexander}",
year = "2005",
month = "4",
doi = "10.1111/j.1462-2920.2005.00722.x",
language = "English",
volume = "7",
pages = "544--552",
journal = "Environmental Microbiology",
issn = "1462-2912",
publisher = "BLACKWELL PUBLISHING LTD",
number = "4",

}

TY - JOUR

T1 - Flux and turnover of fixed carbon in soil microbial biomass of limed and unlimed plots of an upland grassland ecosystem

AU - Rangel-Castro, Juan Ignacio

AU - Prosser, James Ivor

AU - Ostle, N.

AU - Scrimgeour, C. M.

AU - Killham, Kenneth Stuart

AU - Meharg, Andrew Alexander

PY - 2005/4

Y1 - 2005/4

N2 - The influence of liming on rhizosphere microbial biomass C and incorporation of root exudates was studied in the field by in situ pulse labelling of temperate grassland vegetation with (CO2)-C-13 for a 3-day period. In plots that had been limed (CaCO3 amended) annually for 3 years, incorporation into shoots and roots was, respectively, greater and lower than in unlimed plots. Analysis of chloroform-labile C demonstrated lower levels of C-13 incorporation into microbial biomass in limed soils compared to unlimed soils. The turnover of the recently assimilated C-13 compounds was faster in microbial biomass from limed than that from unlimed soils, suggesting that liming increases incorporation by microbial communities of root exudates. An exponential decay model of C-13 in total microbial biomass in limed soils indicated that the half-life of the tracer within this carbon pool was 4.7 days. Results are presented and discussed in relation to the absolute values of C-13 fixed and allocated within the plant-soil system.

AB - The influence of liming on rhizosphere microbial biomass C and incorporation of root exudates was studied in the field by in situ pulse labelling of temperate grassland vegetation with (CO2)-C-13 for a 3-day period. In plots that had been limed (CaCO3 amended) annually for 3 years, incorporation into shoots and roots was, respectively, greater and lower than in unlimed plots. Analysis of chloroform-labile C demonstrated lower levels of C-13 incorporation into microbial biomass in limed soils compared to unlimed soils. The turnover of the recently assimilated C-13 compounds was faster in microbial biomass from limed than that from unlimed soils, suggesting that liming increases incorporation by microbial communities of root exudates. An exponential decay model of C-13 in total microbial biomass in limed soils indicated that the half-life of the tracer within this carbon pool was 4.7 days. Results are presented and discussed in relation to the absolute values of C-13 fixed and allocated within the plant-soil system.

KW - SUBSTRATE-INDUCED RESPIRATION

KW - FUMIGATION-EXTRACTION

KW - LOLIUM-PERENNE

KW - RHIZOSPHERE

KW - PLANT

KW - COMMUNITY

KW - RYEGRASS

KW - RNA

KW - DECOMPOSITION

KW - METABOLISM

U2 - 10.1111/j.1462-2920.2005.00722.x

DO - 10.1111/j.1462-2920.2005.00722.x

M3 - Article

VL - 7

SP - 544

EP - 552

JO - Environmental Microbiology

JF - Environmental Microbiology

SN - 1462-2912

IS - 4

ER -